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These classes represent conserved currencies that form the basis for exchange.

{@link net.commerce.zocalo.currency.Currency} is the base class for money (represented
by {@link net.commerce.zocalo.currency.Funds}) and tradable
{@link net.commerce.zocalo.currency.Coupons}, which represent the assets in a prediction market.<p>

{@link net.commerce.zocalo.currency.CashBank} and {@link net.commerce.zocalo.currency.CouponBank}
are the issuers of Funds and Coupons respectively.  They provide the ability to control the
issuance of these currencies.  In the <b>capability</b> sense, they should be "closely held", to
ensure that the authority to issue new valuable currencies isn't misused.<p>

{@link net.commerce.zocalo.currency.Accounts} manage cash and coupons for users.

<br><table border=1 align=center> <tr><td valign=middle> &copy;
Copyright 2007 Chris Hibbert; &copy; 2006 CommerceNet Consortium, LLC.
All rights reserved.
<p> This software is published under the terms of the MIT license,
a copy <br> of which has been included with this
distribution in the LICENSE file.  </td> </tr></table> <br>

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